SN EN 50020 : 2002

Cooperating organizations
National foreword
Foreword
1. Scope
2. Normative references
3. Definitions
4. Grouping and classification of intrinsically safe
     apparatus and associated apparatus
5. Categories of electrical apparatus
6. Apparatus requirements
7. Components on which intrinsic safety depends
8. Infallible components, infallible assemblies of
     components and infallible connections
9. Diode safety barriers
10. Type verifications and type tests
11. Routine verifications and tests
12. Marking
13. Documentation
Annexes
A. (normative) Assessment of intrinsically safe circuits
B. (normative) Spark test apparatus for intrinsically
     safe circuits
C. (informative) Measurement of creepage distances,
     clearance and separation distances through casting
     compound and through solid insulation
D. (normative) Encapsulation
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Specifies the construction and testing of intrinsically safe apparatus, meant for use in potentially explosive atmospheres and for associated apparatus, which is meant for connection to intrinsically safe circuits which enter such atmospheres. Coverage includes: documentation, marking, and diode safety barriers. Also gives detailed definitions and annexes.